In the rapidly evolving landscape of digital finance, the passage of the CLARITY Act—formally H.R. 3633, which cleared the House in July 2025 and is poised for Senate approval—promises to usher in a new era of structured disclosures and regulatory oversight for digital assets. Billed as a means to migrate America’s $500 trillion capital markets onto public blockchains, this legislation could fundamentally transform how we handle securities, stablecoins, and decentralized finance.
Yet, a series of recent regulatory filings and an MIT study paint a far more alarming picture: one where Maximal Extractable Value (MEV) attacks could spark an arms race among powerful institutions, rendering public blockchains computationally infeasible and prohibitively expensive for everyday users. Are banks, armed with vast resources and regulatory influence, positioning themselves to exploit this shift and effectively “rob” the public through hidden manipulations? The evidence demands urgent scrutiny.
Understanding the CLARITY Act and Its Blockchain Ambitions
The CLARITY Act builds on frameworks like the GENIUS Act of 2025, aiming to create clear jurisdictional lines between the SEC and CFTC for digital assets while mandating robust disclosure requirements. Proponents argue it will enable seamless integration of traditional finance with blockchain technology, allowing for real-time settlements via stablecoins and smart contracts. A June 2025 memo from a meeting between the SEC’s Crypto Task Force, Auditchain Labs AG, and Rutgers Business School highlights efforts to operationalize investor protections through machine-readable disclosures, emphasizing blockchain’s potential for massive cost savings—potentially hundreds of billions across U.S. business lines.
However, coordinated comment letters filed this month to the FDIC, OCC, and SEC reveal deeper concerns. The FDIC filing, for instance, proposes a 136-question questionnaire and a 107-element XBRL taxonomy for stablecoin issuers, focusing on Blockchain Network Participation (BNP)—activities like mining, staking, and governance that underpin public blockchains. Similarly, the SEC Regulation S-K reform comment advocates extending Inline XBRL tagging to non-financial disclosures, including blockchain dependencies and smart contract vulnerabilities. These proposals underscore the Act’s intent to foster transparency, but they also expose vulnerabilities: as capital markets flood onto public chains, the incentives for exploitation skyrocket.
The MEV Menace: From Niche Exploit to Systemic Threat
At the heart of this concern lies MEV, a mechanism where blockchain validators (miners in Proof-of-Work or stakers in Proof-of-Stake) can reorder, insert, or censor transactions within blocks to extract maximum profit. Often likened to front-running in traditional markets, MEV attacks enable participants to prioritize their own trades or those of affiliates, manipulating fees and outcomes at the expense of ordinary users. The FDIC comment explicitly flags MEV as a form of market manipulation, warning that undisclosed BNP by stablecoin issuers or their affiliates could lead to hidden leverage and regulatory arbitrage.
Post-CLARITY, with trillions in value migrating to these networks, the stakes intensify. The SEC S-K proposal notes that concentration among validators—where a few entities control significant hash power or stake—could result in censorship, transaction reordering, or even network failures under stress.
This isn’t mere theory; an MIT study on stablecoins in the GENIUS Act era published a week before the barrage of regulatory filings warns of technological disruptions impairing transferability, even for well-backed assets, due to bottlenecks in blockchain “plumbing.” While the study focuses on financial risks like redemption surges, it implicitly highlights how scaling under regulatory mandates could amplify blockchain fragilities.
An Arms Race in the Making: Computational Infeasibility and Soaring Costs
The real peril emerges when MEV evolves into an arms race. As banks and large institutions enter the fray—bolstered by OCC chartering amendments for digital asset custody—they bring unparalleled computational resources and capital. Dominant players could monopolize BNP, creating procyclical risks and putting their own interests before the public: imagine cascading liquidations during market downturns, where validators prioritize their interests, dislocating treasury bond markets, driving up transaction fees and gas costs to astronomical levels.
The FDIC filing cautions that such dominance might foster systemic vulnerabilities and that MEV risk mitigation tools are not enough. Bank affiliated mining and validation activities must be transparently disclosed to investors and users to make critical decisions.
Without stringent enforcement, public blockchains could become computationally infeasible for retail users, as the energy and hardware demands for competitive participation escalate. Fees might surge, pricing out individuals and small businesses, effectively privatizing what was meant to be a democratized infrastructure. The MIT study reinforces this by stressing the need for integrated governance to avert disruptions, yet current filings suggest regulators may underestimate the technological arms race.
Are Banks Preparing to Rob the Public?
This begs the provocative question: Are banks gearing up to exploit this system? With their lobbying power and access to cheap capital, banks could dominate validator networks under CLARITY’s umbrella, engaging in subtle MEV extraction that siphons value from the public. The SEC meeting memo hints at coordinated oversight, but the filings reveal gaps—undisclosed affiliate activities could mask shadow banking practices, turning public chains into profit machines for the elite. It’s not hyperbole to call this a potential “robbery”: everyday transactions could face inflated costs, delayed executions, or outright exclusion, all while banks rebate profits to themselves.
The proposals in these filings—while forward-thinking—call for immediate action: mandatory machine-readable disclosures on BNP activities, rigorous questionnaires, and preemptive risk management. Yet, if ignored, CLARITY could inadvertently accelerate this dystopia.
A Call for Vigilance
The convergence of these regulatory efforts and academic insights should alarm policymakers, investors, and the public alike. Blockchain’s promise of efficiency and inclusion risks being hijacked by an MEV-fueled arms race dominated by banks, making public networks a playground for the powerful. To prevent this, we must demand stronger safeguards: enhanced MEV mitigations, decentralized governance mandates, and equitable access provisions. Otherwise, the CLARITY Act might not clarify the future—it could cloud it in exclusion and exploitation. The time to act is now, before the arms race leaves the general public in the dust.
